Haeold j



(No Model.)

H. J. BELL.

INCANDESCBNT GAS BURNER.

No. 396,253. Patented Jan. 15, 1889.

N. PETzns, Pmwumngmplm, wn-ningm. n, c4

UNITED STATES PATENT OFFICE.,

HAROLD J. BELIl, OF VOOIIBURY, NEIV JERSEY, ASSIGNOR TO THE VELS- BACI-IV INOANDESOENT GAS LIGHT COMPANY, OF NE\V JERSEY.

iNcANDEscENT GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 396,253, dated January 15, 1889. Application filed March 8, 188g. Serial No1 266,504. (No model.)

To all whom it may concern;V

Be it known that I, HAROLD J. BELL, a citizen of the United States, residing at lVoocl bury, in the county of Gloucester and State of New Jersey, have invented new and useful Improvements in Incandescent Gas-Lamps, of

which the following is a specification.

This-invention relates to incandescent gaslamps of the class employed in the Ielsbach system of incandescent gas-lighting.

The invention consists in the combination, with a burner-tip having a number of lateral gas-exits, of a refractory open-top cap surroundihg said exits and forming with the burner-tip an annular flame-passage, besides affording a chamber. for effecting' a thorough mixture of gas and air at the point of ignition without liability of the gas being flashed back into the burner-tube by external air-currents.

The invention also consists in the combination, with said burner tip and cap, of a cup held in place by said cap to receive and protect the lower end of a mantle suspended above and around the burner; and, further, the invention consists in certain peculiarities in the construction and combination of parts, whereby the lamp is improved, as hereinafter more fully set forth.

In the annexed drawings, illustrating' the invention, ,Figure l is a partly-sectional elevation of an incandescent gas-lam p embodying my improvements. Fig. 2 is atopview of the lamp. Fig. 3 is a partly-sectional elevation of the burner-tip. Fig. i is a top view of the same, partly in horizontal section. Fig. 5 is a partly-sectional view of the refractory cap. Fig. 6 is a partly-sectional elevation of the perforated cup. Fig. 7 is a plan or top view of the perforated cup. Fig. 8 is a sectional elevation of the mantle-supporting rod.

The numeral l designates an atmospheric burner-tube, provided at its lower end with lateral orifices 2 for admission of air, and with a threaded thimble, 3, for attachment to a gasfixture.

To the lower portion of the tube l may be attached a shield, ai, to surround the air-inlets, as shown. Below the air-inlets is a thin perforated metallic plate, 3, for dividing .the incoming gas into fine currents. A gallery, 5, of suitable construction is suspended on the burner-tube by means of an upper inwardlyturned gallery-lip, 6, resting on the upper edge of said burner-tube or the gallery may be sup ported on the tube in any convenient manner.

The upper portion of the gallery is provided with an annular head or shoulder, 7, for supporting a metallic collar, 8, the lower portion of which is contracted and made cylindrical, to fit closely onto the upper tubular end of the gallery, to' which it may be secured by a bayonet-joint or otherwise. The collar 8 is formed with a horizontal laterally-projecting shoulder, 9, on a level with the top of the burneretube l, and from that point is lared outward and upward. After the collarY 8 has been attached to the gallery a burner-tip, l0, having at its lower end a tlange,11, can be set in the collar, with the flange ll resting on the shoulder 9, as shown in Eig. Il.

A metallic cup, l2, open at top and bottom, is placed on the upper end of the collar, and an open-ended cap, 13, having a neck, 14, is placed over the burner-tip and through the cup 12 until the lower end of the neck 14 rests on the burner-tip flange 11 within the collar S, thereby holdin g the burner-tip l0 and cup l2 in place. It will be seen that the enlarged portion of the collar S is of sufiicient length to receive the entire length of the neck I4 when resting on the flange l l, as shown in Fig. l. Above its neck 1JC the cap lil .is en* lai'gcd and fori-ns at the junction of its. neck and body portions a shoulder that rests on. the edge of the lower opening in the cup l2, and so prevents vertical displacement of said cup. The inner surface of the neck 14 is cylindrical to correspond with the cylindrical exterior of the burner-tip, wli'ile the external surface of said neck hasa taper that corresponds with the taper or flare of the collar 8, the connection of the parts being thus facilitated. It will be seen that by means oli this collar 8 the several parts can be readily ccnnected and disconnected, as desired.

In the vertical Wall of the burner-tip 10, opposite the enlarged upper part of the cap 13, is formed one or more annular series of orifices, 15, for exit of gas vand air from the atmospheric burner. It will be seen that the burner-cap 13 thus forms a chamber which surrounds the burner-exits, affords ample IOO f space for a thorough mixture ot' gas and air at the point of ignition, and prevents any iashing back of gas into the bnrner=tube. This effect is increased by contracting the upper edge of the cap 13 so as to form an inwardly-turned lip, 16, between which and the burner-tip is an annular flamepassage, 17, below the top of the burner-tip.

The burner-tip 10 and surrounding cap .lf3 are made of steatite, lava, or other| refractory material. The cup 1 2 may be composed of metal. This cup is provided with an annular series of perforation s, 18,which permits ready access for currents of air to pass up on the outer surface of the mantle, and yet protects the mantle from injury in igniting.

The gallery 5 is provided with vertical springholders 19 for a perfectly straight glass chimney, 20, that is cyindrical throughontits entire length. Within this chimney is placed a straight Vertical rod, 21, that is adj ustably supported by engaging its lower end in a perforated lug, 22, formed on the gallery and provided with a set-screw, 23, for holding the rod at any desired elevation. The upper en d of the rod 21 is bent inward to form a horizontal offset, 24, and supporting-ring 25, Yfrom which the mantle 2G is suspended by platinum wires 27, as usual.

. By providing the lamp with a straight chimney I am enabled to use a 1nantle-supporting rod without the usual bend in its lower portion and can locate it at a greater distance from the burner and incandescent mantle, thereby avoiding any tendency to warping or bending of the rod due to overheating.

A straight rod, 21, having an offset, 24;, at its upper end, so as to properly center the mantle, and located within a perfectly cylindrical chimn ey, as shown, will also obviate any liability of contact between the rod and mantle, which would result in injury to the fragile mantle structure. By this construction, also, I am enabled to use a larger mantlethan ordinary, with consequent increase in the etliciency of the illumination.

The construction of the bnrner-tip with its lateral exits and the surroundin cap and perforated cup is such that a more than ordinarily thorough combustion of gas is obtained and a more perfect ineandescence of the mantle, owing to the equal distribution of heat on its surface. This is also aided by the employment of a perfectly cylindrical chimney, which, being devoid of contractions, prevents a concentration oit' heat on any one point on the mantle-surface.

I would have it understood that I do not broadly claim, in an incandescent gas-lamp, a protecting-cup adapted to receive an d protect the lower end of a fragile mantle, nor the combination of the burner, the incandescent mantle suspended above the burner and having its lower edge below the burner-outlet, and the proteeting-cup below and surrournling the lower edge of said mantle, as such is forming with the burner-tip an annular flame-I passage, 17, and a mantle placed above and around said burner-tip and cap, substantially,

as described. Y

2. In an incandescent gas-lamp, the combination, with la burner-tip having lateral gas` exits, oif a cap surrounding said exits'and provided with a dame-passage, and a cup held in place by said cap, substantially as described.

3. In an incandescent gas-lamp, the combination, with a burner, ot' a perforated cup surrounding the burner, and a mantle placed above and around the burner, with its lower end surrounded by said perforated cup, substantially as described.

et. In an incandescent gas-lamp, the combination, with a burner-tube and a detachable er-tube, substantially as described.

5. In an incandescent gas-lamp, the combi- 1 nation, with a burner-tube and a detachable burner-tip, of a detachable cap surrounding the burner-tip, a detachable collar to hold said lmrner-tip and cap in place on the burnertube, and a detachable cup held in place by said collar and cap, substantially as described.

G. In an incandescent gas-lamp, the combination of a burner-tube, a chimney-gallery supported on said tube, a detachable collar supported on and projecting above the `gallery and burner-tube, a detachable burner-tip, a detachable cap supported in said collar between the collar and burner-tip, a mantle, and a cup supported by the collar and cap and surrounding the lower end of the mantle, substantially as described.

7. An incandescent gas-lamp comprising an atmospheric gas-tube, a chimney-gallery supported on said tube, a collar supported on and projecting above the gallery and burner-tube, a detachable burner-tip, detachable open-top cap, and detachable mantle-protecting cup held in place by said collar, a mantle, a straight mantlc-supporting rod, and a straight chimney cylindrical throughout its entire length, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HAROLD J. BELL. lvitnesses:

WALDRON SHAPLEIGH, G. R. TAGGART. 

